Advancements in both data prep and viz

R code for data prep
-Fixed a bug in the R code for data prep.
-now preparing all of the evidence needed for edges
viz:
- added linked view
- collapsed node label animation for easy selection
-changed viz of collapsed edges such that only edges that contain non
candidates/training are shown as 2nd order so that there isn't any
redundancy
-added dual encoding for 2nd order edges with high joint probability
- enhanced node label placement to be more precise
- changed encodings for nodes/edges in main and linked view (e.g.
lighter edges and white collapsed nodes, changed to softer yellow,
smaller radius/font, blue thick borders for greater contrast of
candidates)
-fixed positions for the related training/canddiate nodes in the linked
view (so the nodes on either side of the collapsed node selected stay
in the same relative position in both views)